EP0695403B1 - Brake motor provided with a ramp - Google Patents
Brake motor provided with a ramp Download PDFInfo
- Publication number
- EP0695403B1 EP0695403B1 EP94913086A EP94913086A EP0695403B1 EP 0695403 B1 EP0695403 B1 EP 0695403B1 EP 94913086 A EP94913086 A EP 94913086A EP 94913086 A EP94913086 A EP 94913086A EP 0695403 B1 EP0695403 B1 EP 0695403B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- push rod
- cylinder
- rolling
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/14—Mechanical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2123/00—Multiple operation forces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
- F16D2125/28—Cams; Levers with cams
- F16D2125/32—Cams; Levers with cams acting on one cam follower
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/64—Levers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/68—Lever-link mechanisms, e.g. toggles with change of force ratio
Definitions
- the present invention relates to a mechanical device for actuating a piston relative to a cylinder, in particular in a disc brake, this device comprising a pusher integral in translation with the piston, a lever mounted to rotate relative to the cylinder in an axial plane of the latter. , a ball joint connecting one end of the lever to one end of the pusher to allow relative rotation of this lever and of this pusher, a means for guiding in translation the pusher in the cylinder, a rolling surface fixed relative to the cylinder and forming a cam , and rolling means bearing on the surface forming a cam to allow the rolling of the lever on this surface, this rolling being accompanied by a rotation of this lever around the ball and a translation of this ball and the pusher relative to the cylinder.
- the present invention aims to provide a brake motor of the type defined above, of simple structure, but nevertheless making it possible to animate the pusher with a pure movement of axial translation.
- the device of the invention is essentially characterized in that the rolling means are only supported on the rolling surface at a single point on the axial plane of the cylinder.
- the ball joint is constituted by a ball enclosed between the end of the pusher and the end of the lever and the rolling means consist of a roller mounted for rotation on the lever.
- the cam surface can be essentially constituted by an inclined plane and the pusher can be biased towards the lever by at least one Belleville washer.
- the device concerned mainly intended to allow the mechanical actuation of the piston 1 of a disc brake relative to the cylinder 2 of the latter, essentially comprises a pusher 3 integral in translation with the piston, a lever 4 rotatably mounted relative to the cylinder 2 in an axial plane of the latter, namely the plane of the figure, and a ball joint formed by a ball 5 sandwiched between the end 3a of the pusher and the end 4a of the lever and connecting these ends to allow relative rotation of this lever and this pusher.
- the pusher is secured to a means for guiding in translation, for example taking the form of a plate 6 capable of sliding in a bore 2a of the cylinder, and the pusher 3 is biased towards the lever 4 by a stack of Belleville washers, such as 7, tending to push back the guide plate 6 from a fixed part 2b of the cylinder.
- the rolling member that constitutes the roller 9 is only supported on the rolling surface 8 at a single point 8b of the axial plane of the cylinder, which results in that the pusher is driven by a pure axial translation movement.
- point 8b in question is that which corresponds to the trace, in the axial plane of the device which contains the rotational movement of the lever, of the zone in which the rolling surface 8 and the roller 9 are tangent l to each other.
- point 8b in reality has only a virtual existence in the illustrated embodiment, since the axial plane, constituted by the plane of the figure, in this case passes through the opening 8a, at the level from which the roller 9 and the rolling surface 8 cannot be in contact with one another.
- the lever 4 can be provided with a roller such as 9 on either side of the elongated opening 8a, so as to avoid the appearance of any force perpendicular to the axial plane, that is to say in the plane of the figure.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Actuator (AREA)
Abstract
Description
La présente invention concerne un dispositif mécanique pour actionner un piston par rapport à un cylindre, notamment dans un frein à disque, ce dispositif comprenant un poussoir solidaire en translation du piston, un levier monté rotatif par rapport au cylindre dans un plan axial de ce dernier, une rotule reliant une extrémité du levier à une extrémité du poussoir pour permettre une rotation relative de ce levier et de ce poussoir, un moyen de guidage en translation du poussoir dans le cylindre, une surface de roulement fixe par rapport au cylindre et formant came, et des moyens de roulement prenant appui sur la surface formant came pour permettre le roulement du levier sur cette surface, ce roulement s'accompagnant d'une rotation de ce levier autour de la rotule et d'une translation de cette rotule et du poussoir par rapport au cylindre.The present invention relates to a mechanical device for actuating a piston relative to a cylinder, in particular in a disc brake, this device comprising a pusher integral in translation with the piston, a lever mounted to rotate relative to the cylinder in an axial plane of the latter. , a ball joint connecting one end of the lever to one end of the pusher to allow relative rotation of this lever and of this pusher, a means for guiding in translation the pusher in the cylinder, a rolling surface fixed relative to the cylinder and forming a cam , and rolling means bearing on the surface forming a cam to allow the rolling of the lever on this surface, this rolling being accompanied by a rotation of this lever around the ball and a translation of this ball and the pusher relative to the cylinder.
Des dispositifs de ce type sont bien connus dans l'art antérieur et un exemple en est donné par le document WO 92/07202.Devices of this type are well known in the prior art and an example is given by document WO 92/07202.
La conception de ces dispositifs est soumise à de multiples contraintes incluant notamment des exigences de rendement mécanique et de faible coût de fabrication.The design of these devices is subject to multiple constraints including in particular requirements of mechanical efficiency and low manufacturing cost.
Bien que le document antérieur précédemment identifié concerne un frein conçu avec le souci de répondre à ces exigences, la cinématique du système qu'il décrit se trouve affectée par la structure retenue, le poussoir ne pouvant être animé d'un pur mouvement de translation.Although the previously identified earlier document relates to a brake designed with the aim of meeting these requirements, the kinematics of the system which it describes is affected by the structure chosen, the pusher being unable to be driven by a pure translational movement.
Dans ce contexte, la présente invention a pour but de proposer un moteur de frein du type précédemment défini, de structure simple, mais permettant néanmoins d'animer le poussoir d'un pur mouvement de translation axiale.In this context, the present invention aims to provide a brake motor of the type defined above, of simple structure, but nevertheless making it possible to animate the pusher with a pure movement of axial translation.
A cette fin, le dispositif de l'invention est essentiellement caractérisé en ce que les moyens de roulement ne sont en appui sur la surface de roulement qu'en un seul point du plan axial du cylindre.To this end, the device of the invention is essentially characterized in that the rolling means are only supported on the rolling surface at a single point on the axial plane of the cylinder.
Selon un mode de réalisation simple et efficace, la rotule est constituée par une bille enserrée entre l'extrémité du poussoir et l'extrémité du levier et les moyens de roulement sont constitués d'un galet monté à rotation sur le levier.According to a simple and effective embodiment, the ball joint is constituted by a ball enclosed between the end of the pusher and the end of the lever and the rolling means consist of a roller mounted for rotation on the lever.
Par exemple, la surface formant came peut être essentiellement constituée par un plan incliné et le poussoir peut être sollicité vers le levier par au moins une rondelle Belleville.For example, the cam surface can be essentially constituted by an inclined plane and the pusher can be biased towards the lever by at least one Belleville washer.
D'autres caractéristiques et avantages de l'invention pourront ressortir de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence au dessin annexé dont l'unique figure est une vue en coupe d'un dispositif conforme à l'invention.Other characteristics and advantages of the invention will emerge from the description given below, by way of indication and in no way limitative, with reference to the appended drawing, the sole figure of which is a sectional view of a conforming device. to the invention.
Le dispositif concerné, principalement destiné à permettre l'actionnement mécanique du piston 1 d'un frein à disque par rapport au cylindre 2 de ce dernier, comprend essentiellement un poussoir 3 solidaire en translation du piston, un levier 4 monté rotatif par rapport au cylindre 2 dans un plan axial de ce dernier, à savoir le plan de la figure, et une rotule constituée par une bille 5 enserrée entre l'extrémité 3a du poussoir et l'extrémité 4a du levier et reliant ces extrémités pour permettre une rotation relative de ce levier et de ce poussoir.The device concerned, mainly intended to allow the mechanical actuation of the
Le poussoir est solidaire d'un moyen de guidage en translation, prenant par exemple la forme d'une plaque 6 susceptible de coulisser dans un alésage 2a du cylindre, et le poussoir 3 est sollicité vers le levier 4 par un empilage de rondelles Belleville, telles que 7, tendant à repousser la plaque de guidage 6 d'une partie fixe 2b du cylindre.The pusher is secured to a means for guiding in translation, for example taking the form of a
Une surface de roulement 8, fixe par rapport au cylindre 2 et essentiellement constituée par un plan incliné formant came, ferme l'alésage 2a de ce cylindre à l'extrémité opposée de celle où coulisse le piston 1.A
Une ouverture 8a pratiquée dans cette surface et allongée dans le plan de la figure permet à cette surface d'être traversée par le levier 4.An opening 8a made in this surface and elongated in the plane of the figure allows this surface to be crossed by the
Un galet 9, monté à rotation sur un point fixe du levier 4 au moyen d'un roulement à rouleaux 10, prend appui sur la surface 8 formant came pour permettre le roulement du levier sur cette surface, ce roulement s'accompagnant d'une rotation de ce levier autour de la bille 5 et d'une translation de cette bille, du poussoir 3 et du piston 1 par rapport au cylindre 2.A
Selon l'invention, l'organe de roulement que constitue le galet 9 n'est en appui sur la surface de roulement 8 qu'en un seul point 8b du plan axial du cylindre, ce dont il résulte que le poussoir est animé d'un pur mouvement de translation axiale.According to the invention, the rolling member that constitutes the
Il faut bien comprendre que le point 8b en question est celui qui correspond à la trace, dans le plan axial du dispositif qui contient le mouvement de rotation du levier, de la zone dans laquelle la surface de roulement 8 et le galet 9 sont tangents l'un à l'autre.It should be understood that the
A ce titre, le point 8b n'a en réalité qu'une existence virtuelle dans le mode de réalisation illustré, puisque le plan axial, constitué par le plan de la figure, passe en l'occurrence par l'ouverture 8a, au niveau de laquelle le galet 9 et la surface de roulement 8 ne peuvent pas se trouver en contact l'un avec l'autre.As such,
Selon une variante avantageuse de l'invention, le levier 4 peut être doté d'un galet tel que 9 de part et d'autre de l'ouverture allongée 8a, de manière à éviter l'apparition de toute force perpendiculaire au plan axial, c'est-à-dire au plan de la figure.According to an advantageous variant of the invention, the
Claims (5)
- Mechanical device for actuating a piston (1) with respect to a cylinder (2), particularly in a disk brake, this device comprising a push rod (3) translationally secured to the piston, a lever (4) mounted so that it can rotate with respect to the cylinder (2) in an axial plane of the latter, a ball joint (5) joining one end (4a) of the lever to one end (3a) of the push rod to allow a relative rotation of this lever and of this push rod, a means (6) for translationally guiding the push rod in the cylinder, a rolling surface (8) which is fixed with respect to the cylinder and which forms a cam, and rolling means (9) bearing on the surface forming a cam to allow the lever to roll over this surface, this rolling being accompanied by a rotation of this lever about the ball joint and by a translation of this ball joint and of the push rod with respect to the cylinder, characterized in that the rolling means (9) bears on the rolling surface (8) at only one single point (8b) of the said axial plane, whence it results that the push rod is given a pure axial translational movement.
- Device according to claim 1, characterized in that the ball joint (5) consists of a ball trapped between the end (3a) of the push rod and the end (4a) of the lever.
- Device according to claim 1 or 2, characterized in that the rolling means is formed by a roller mounted so that it can rotate on the lever.
- Device according to any one of the preceding claims, characterized in that the surface which forms a cam essentially comprises an inclined plane.
- Device according to claim 4, characterized in that the push rod is urged toward the lever by at least one Belleville washer (7).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO930299 | 1993-04-30 | ||
ITTO930299A IT1260923B (en) | 1993-04-30 | 1993-04-30 | BRAKE RAMP ACTUATOR |
PCT/EP1994/000997 WO1994025774A1 (en) | 1993-04-30 | 1994-03-30 | Brake motor provided with a ramp |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0695403A1 EP0695403A1 (en) | 1996-02-07 |
EP0695403B1 true EP0695403B1 (en) | 1997-01-15 |
Family
ID=11411456
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94913086A Expired - Lifetime EP0695403B1 (en) | 1993-04-30 | 1994-03-30 | Brake motor provided with a ramp |
Country Status (6)
Country | Link |
---|---|
US (1) | US5558185A (en) |
EP (1) | EP0695403B1 (en) |
DE (1) | DE69401505T2 (en) |
ES (1) | ES2099605T3 (en) |
IT (1) | IT1260923B (en) |
WO (1) | WO1994025774A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4430258C1 (en) * | 1994-08-25 | 1996-01-04 | Perrot Bremsen Gmbh | Actuating mechanism for disc brake |
DE10021571B4 (en) * | 2000-05-03 | 2010-04-29 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Air-operated disc brake with pressure elements |
CA2323817A1 (en) * | 2000-10-18 | 2002-04-18 | New Tech Brake Inc./Frein Newtech Inc. | Disc brake for heavy road vehicles |
DE10260597B4 (en) * | 2002-12-23 | 2005-06-02 | Haldex Brake Products Ab | Brake mechanism for a disc brake |
EP1576303A1 (en) * | 2002-12-23 | 2005-09-21 | Haldex Brake Products AB | Brake gear for a disc brake |
DE102005051082A1 (en) * | 2005-10-25 | 2007-05-03 | Lucas Automotive Gmbh | Hydraulic vehicle brake |
TWM434724U (en) * | 2012-02-08 | 2012-08-01 | Tektro Technology Corp | Transmission structure of bicycle brake device |
USD761338S1 (en) * | 2014-07-25 | 2016-07-12 | Inter-Power Corporation | Billet push rod |
USD763140S1 (en) * | 2014-07-25 | 2016-08-09 | Inter-Power Corporation | Billet push rod |
USD763331S1 (en) * | 2014-07-25 | 2016-08-09 | Inter-Power Corporation | Billet push rod |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1284273A (en) * | 1969-06-18 | 1972-08-02 | Girling Ltd | Improvements relating to automatic adjusters for vehicle brakes |
CA1030881A (en) * | 1975-04-02 | 1978-05-09 | Donald D. Johannesen | Mechanically actuated disc brake |
US4454933A (en) * | 1981-04-27 | 1984-06-19 | Kelsey Hayes Company | Disc brake |
DE3505773A1 (en) * | 1985-02-20 | 1986-08-21 | Alfred Teves Gmbh, 6000 Frankfurt | Spot-type disc brake, in particular for motor vehicles |
DE4032885A1 (en) * | 1990-10-17 | 1992-04-23 | Knorr Bremse Ag | DISC BRAKE FOR VEHICLES, IN PARTICULAR ROAD VEHICLES |
DE4217983A1 (en) * | 1991-06-26 | 1993-01-28 | Teves Gmbh Alfred | Actuator for vehicle disc brake - has cylindrical pressure bar with large contact pressure surfaces adjacent to actuating cam |
-
1993
- 1993-04-30 IT ITTO930299A patent/IT1260923B/en active IP Right Grant
-
1994
- 1994-03-30 DE DE69401505T patent/DE69401505T2/en not_active Expired - Fee Related
- 1994-03-30 WO PCT/EP1994/000997 patent/WO1994025774A1/en active IP Right Grant
- 1994-03-30 EP EP94913086A patent/EP0695403B1/en not_active Expired - Lifetime
- 1994-03-30 ES ES94913086T patent/ES2099605T3/en not_active Expired - Lifetime
- 1994-03-30 US US08/211,843 patent/US5558185A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69401505D1 (en) | 1997-02-27 |
ES2099605T3 (en) | 1997-05-16 |
ITTO930299A1 (en) | 1994-10-30 |
ITTO930299A0 (en) | 1993-04-30 |
EP0695403A1 (en) | 1996-02-07 |
DE69401505T2 (en) | 1997-05-15 |
IT1260923B (en) | 1996-04-29 |
US5558185A (en) | 1996-09-24 |
WO1994025774A1 (en) | 1994-11-10 |
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